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Finding the Fourth Proportional to 325,628.80, 488,443.20 and 219,340.60

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Solution

The fourth proportional to 325,628.80, 488,443.20 and 219,340.60 is: 329,010.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    325,628.80 : 488,443.20 = 219,340.60 : x
  2. Step 2: Convert to fraction form
    325,628.80/488,443.20 = 219,340.60/x
  3. Step 3: Cross multiply
    325,628.80x = 488,443.20 × 219,340.60
  4. Step 4: Simplify right side
    325,628.80x = 107,135,424,553.92
  5. Step 5: Solve for x
    x = 107,135,424,553.92/325,628.80
  6. Step 6: Final answer
    x = 329,010.90

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.